Lewis & Short

ăsyndĕton, i, n., = ἀσύνδετον, a rhetorical figure by which the connecting particle is omitted (in pure Lat., dissolutio), e. g. Veni, vidi, vici; cf. Diom. p. 440 P.
Adj.: ăsyndĕtus, a, um, in astronomy, of stars, standing without any connection with, or reference to, a constellation: Mercurius, Sid. Ep. 8, 11.